How to apply the bending effect to objects that are already beveled
Edit: Ok so I screwed my answer because I've imported your object as an .obj into 2.79, so it has applied the modifier, but my answer will help to fix the problem with the face.

You've made a mistake with your object. Actually you have a series of parallel edges made of a series of vertices and that are not filled with faces, and on the bottom you have a big face.



As I suppose it's not what you want, select this face and delete it (X (Delete) > Only Faces). You now have your edges.



Make sure you have your LoopTools addon activated, select all and RMB (in 2.8) or W (in 2.7) > LoopTools > Loft, it will fill the whole thing with faces.




Now you have a shape that is already bent, so I'm not sure what you're trying to do. Also I think you might get rid of some edge loops but again, it depends on your final purpose...